Guys Help!!! My Ace giving no response, cant even get into download/recovery mode

Yesterday i forgot to charged my phone, i think this caused it to turned off automatically. Now i tried to charged or even replace a full charged battery but still i cant turn on my phone. It has no response at all, i even try to push the vol down+home+power button to get into recovery mode but it still dead. what should i do? PLS help me out ~~~!!!:(
 
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